Fig. 24.— Scheme 



Gr., grey ; W, white 

 matter of spinal 

 cord ; A, inferior ; 

 P, superior root ; 

 6, ganglion on the 

 superior root ; N, 

 mixed nerve, con- 

 sisting of sensory 

 and motor 

 branches with 

 fibres passing into 

 the sympathetic 

 system at V ; N 1 , 

 spinal nerve, con- 

 sisting of sensory 

 and motor 

 branches, termin- 

 ating in M, skeletal 

 muscles, S, sen- 

 sory cell or sur- 

 face, X, in other 

 "ways ; V, white 

 ramus communi- 

 cans uniting the 

 cerebro - spinal 

 with the sym pathe- 

 tic system, running 

 out from the cord 

 with the inferior 

 spinal nerve, and 

 given off from the 

 mixed nerve at V, 

 from whence it 

 passes to S, a gang- 

 lion on the sym- 

 pathetic chain, and 

 passing on at V> 

 to supply the more 

 distant ganglion 

 <t, then at V" to 

 the peripheral 

 ganglion a, and 

 ending in m, a 

 visceral muscle, 

 *, a visceral sen- 

 sory cell or sur- 

 face, .<■, other 

 possible visceral 

 endings. M 



From 2 is given off a branch, r.v., known as the grey ramus com 

 mumcans which partly passes backwards towards the spinal cord 

 ana partly runs, as v.\i.. in connection with the spinal nerve to 



supply vaso-constrictor fibres to the muscles, m r of bl lve«sels in 



certain parts, for example, in the limb*. 

 Sy the sympathetic chain (gangliated cord of the sympathetic uniting 

 cne ganglia of the series 2. The terminations of the other nerves 

 arising From £. *. <i' ■.,,-,■ n..t ^i. ,,„■,, 



